enabling unwind semantics

[v4vijayakumar]

what "enabling unwind semantics" occording to Microsoft (R) 32-bit
C/C++ Optimizing Compiler.

C:\Program Files\Microsoft Visual C++ Toolkit 2003\include\os tream(574)
: warnin
g C4530: C++ exception handler used, but unwind semantics are not
enabled. Speci
fy /EHsc

[Ian Collins]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue]
> what "enabling unwind semantics" occording to Microsoft (R) 32-bit
> C/C++ Optimizing Compiler.
>[/color]
Wrong group (comp.lang.c) on two counts, C++ and windows.

Try a VC++ group.

--
Ian Collins.

[Rolf Magnus]

Re: enabling unwind semantics

v4vijayakumar wrote:
[color=blue]
> what "enabling unwind semantics" occording to Microsoft (R) 32-bit
> C/C++ Optimizing Compiler.
>
> C:\Program Files\Microsoft Visual C++ Toolkit 2003\include\os tream(574)
> : warnin
> g C4530: C++ exception handler used, but unwind semantics are not
> enabled. Speci
> fy /EHsc[/color]

I can only guess that this means you have disabled exception handling in
your compiler.

[v4vijayakumar]

Re: enabling unwind semantics

you mean, there can not be a c/c++ compiler in windows, other than
vc++?

[v4vijayakumar]

Re: enabling unwind semantics

no.

"cl test1.cpp" fails with many errors but "cl /EHsc test1.cpp" compiles
fine.

C:\tmp\cpp>cl test1.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for
80x86
Copyright (C) Microsoft Corporation 1984-2002. All rights reserved.

test1.cpp
C:\Program Files\Microsoft Visual C++ Toolkit 2003\include\os tream(574)
: warnin
g C4530: C++ exception handler used, but unwind semantics are not
enabled. Speci
fy /EHsc
:
:
:


C:\tmp\cpp>cl /EHsc test1.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for
80x86
Copyright (C) Microsoft Corporation 1984-2002. All rights reserved.

test1.cpp
Microsoft (R) Incremental Linker Version 7.10.3077
Copyright (C) Microsoft Corporation. All rights reserved.

/out:test1.exe
test1.obj

C:\tmp\cpp>

[Ian Collins]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue]
> you mean, there can not be a c/c++ compiler in windows, other than
> vc++?
>[/color]
Your original post (which you should quote, by the way) showed output
from some microsoft compiler or another, that's why I suggested asking
on one of their groups.

--
Ian Collins.

[Rolf Magnus]

Re: enabling unwind semantics

v4vijayakumar wrote:
[color=blue]
> you mean,[/color]

Who? Please quote context.
[color=blue]
> there can not be a c/c++ compiler in windows, other than
> vc++?[/color]

1. There is no such thing as "C/C++". C and C++ are two distinct languages.
2. Exception handling is C++ specific, since C doesn't support it, so
comp.lang.c has nothing to do with it.
3. Questions about compilers or system specific ones are off-topic in
comp.lang.c++ either, because this group is only about the C++ language
itself, not about any specific tools.

So you should find a newsgroup about your specific compiler (VC++) and ask
the question there.

[v4vijayakumar]

Re: enabling unwind semantics

> output
from some microsoft compiler

error message itself says it is "Microsoft (R) 32-bit C/C++ Optimizing
Compiler".

[Ian Collins]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue][color=green]
>>output[/color]
>
> from some microsoft compiler
>
> error message itself says it is "Microsoft (R) 32-bit C/C++ Optimizing
> Compiler".
>[/color]
So find an appropriate microsoft group and ask there. That's where the
users of the compiler will be able to help you.

--
Ian Collins.

[v4vijayakumar]

Re: enabling unwind semantics

Rolf Magnus wrote:
blah blah blah

just wanted to know what "enabling unwind semantics" (may be related to
stack) means.

[Ian Collins]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue]
> Rolf Magnus wrote:
> blah blah blah
>
> just wanted to know what "enabling unwind semantics" (may be related to
> stack) means.
>[/color]
Then ask those who might know!

--
Ian Collins.

[Flash Gordon]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue]
> you mean, there can not be a c/c++ compiler in windows, other than
> vc++?[/color]

Please provide context when replying. See the section about Google in

http://clc-wiki.net/wiki/Intro_to_clc

Your original message clearly indicated you were using MS VC++ hence the
redirection to a group for that compiler when you ask something about
the compiler. The language itself does not define compiler options.
--
Flash Gordon, living in interesting times.
Web site - http://home.flash-gordon.me.uk/
comp.lang.c posting guidelines and intro:

http://clc-wiki.net/wiki/Intro_to_clc

[Rolf Magnus]

Re: enabling unwind semantics

v4vijayakumar wrote:
[color=blue]
> just wanted to know what "enabling unwind semantics" (may be related to
> stack) means.[/color]

So you should find a newsgroup about your specific compiler (VC++) and ask
the question there.

[Flash Gordon]

Re: enabling unwind semantics

v4vijayakumar wrote:[color=blue]
> Rolf Magnus wrote:
> blah blah blah
>
> just wanted to know what "enabling unwind semantics" (may be related to
> stack) means.[/color]

So go ask where you might get an answer, as has been suggested.
--
Flash Gordon, living in interesting times.
Web site - http://home.flash-gordon.me.uk/
comp.lang.c posting guidelines and intro:

http://clc-wiki.net/wiki/Intro_to_clc

[Walter Roberson]

Re: enabling unwind semantics

In article <1146648174.544 988.91240@u72g2 000cwu.googlegr oups.com>,
v4vijayakumar <v4vijayakumar@ yahoo.com> wrote:[color=blue][color=green]
>> output[/color]
>from some microsoft compiler[/color]
[color=blue]
>error message itself says it is "Microsoft (R) 32-bit C/C++ Optimizing
>Compiler".[/color]

Not in anything you posted in your original question. You said
it was that, you did not quote any *error message* that said it was.

The error message that you -did- quote started with:

C:\Program Files\Microsoft Visual C++ Toolkit 2003\include\os tream(574)

which clearly indicates VC++, and hence suggesting that you look
in a VC++ group was exactly appropriate.


If you were to google on "unwind semantics are not enabled"
then you would find your answer easily. In particular, see

http://www.geocities.com/Jeff_Louie/problems.htm#Warning

Or if you prefer the more authorative saying of the same thing,

http://msdn.microsoft.com/archive/en-us/dnarvc/html/msdn_stlfaq.asp?frame=true

--
Prototypes are supertypes of their clones. -- maplesoft